sys/vfs/hammer/hammer_vnops.c

   1 /*
   2  * Copyright (c) 2007 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@backplane.com>
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  *
  34  * $DragonFly: src/sys/vfs/hammer/hammer_vnops.c,v 1.30 2008/02/10 09:51:01 dillon Exp $
  35  */
  36
  37 #include <sys/param.h>
  38 #include <sys/systm.h>
  39 #include <sys/kernel.h>
  40 #include <sys/fcntl.h>
  41 #include <sys/namecache.h>
  42 #include <sys/vnode.h>
  43 #include <sys/lockf.h>
  44 #include <sys/event.h>
  45 #include <sys/stat.h>
  46 #include <sys/dirent.h>
  47 #include <vm/vm_extern.h>
  48 #include <vfs/fifofs/fifo.h>
  49 #include "hammer.h"
  50
  51 /*
  52  * USERFS VNOPS
  53  */
  54 /*static int hammer_vop_vnoperate(struct vop_generic_args *);*/
  55 static int hammer_vop_fsync(struct vop_fsync_args *);
  56 static int hammer_vop_read(struct vop_read_args *);
  57 static int hammer_vop_write(struct vop_write_args *);
  58 static int hammer_vop_access(struct vop_access_args *);
  59 static int hammer_vop_advlock(struct vop_advlock_args *);
  60 static int hammer_vop_close(struct vop_close_args *);
  61 static int hammer_vop_ncreate(struct vop_ncreate_args *);
  62 static int hammer_vop_getattr(struct vop_getattr_args *);
  63 static int hammer_vop_nresolve(struct vop_nresolve_args *);
  64 static int hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *);
  65 static int hammer_vop_nlink(struct vop_nlink_args *);
  66 static int hammer_vop_nmkdir(struct vop_nmkdir_args *);
  67 static int hammer_vop_nmknod(struct vop_nmknod_args *);
  68 static int hammer_vop_open(struct vop_open_args *);
  69 static int hammer_vop_pathconf(struct vop_pathconf_args *);
  70 static int hammer_vop_print(struct vop_print_args *);
  71 static int hammer_vop_readdir(struct vop_readdir_args *);
  72 static int hammer_vop_readlink(struct vop_readlink_args *);
  73 static int hammer_vop_nremove(struct vop_nremove_args *);
  74 static int hammer_vop_nrename(struct vop_nrename_args *);
  75 static int hammer_vop_nrmdir(struct vop_nrmdir_args *);
  76 static int hammer_vop_setattr(struct vop_setattr_args *);
  77 static int hammer_vop_strategy(struct vop_strategy_args *);
  78 static int hammer_vop_nsymlink(struct vop_nsymlink_args *);
  79 static int hammer_vop_nwhiteout(struct vop_nwhiteout_args *);
  80 static int hammer_vop_ioctl(struct vop_ioctl_args *);
  81 static int hammer_vop_mountctl(struct vop_mountctl_args *);
  82
  83 static int hammer_vop_fifoclose (struct vop_close_args *);
  84 static int hammer_vop_fiforead (struct vop_read_args *);
  85 static int hammer_vop_fifowrite (struct vop_write_args *);
  86
  87 static int hammer_vop_specclose (struct vop_close_args *);
  88 static int hammer_vop_specread (struct vop_read_args *);
  89 static int hammer_vop_specwrite (struct vop_write_args *);
  90
  91 struct vop_ops hammer_vnode_vops = {
  92         .vop_default =          vop_defaultop,
  93         .vop_fsync =            hammer_vop_fsync,
  94         .vop_getpages =         vop_stdgetpages,
  95         .vop_putpages =         vop_stdputpages,
  96         .vop_read =             hammer_vop_read,
  97         .vop_write =            hammer_vop_write,
  98         .vop_access =           hammer_vop_access,
  99         .vop_advlock =          hammer_vop_advlock,
 100         .vop_close =            hammer_vop_close,
 101         .vop_ncreate =          hammer_vop_ncreate,
 102         .vop_getattr =          hammer_vop_getattr,
 103         .vop_inactive =         hammer_vop_inactive,
 104         .vop_reclaim =          hammer_vop_reclaim,
 105         .vop_nresolve =         hammer_vop_nresolve,
 106         .vop_nlookupdotdot =    hammer_vop_nlookupdotdot,
 107         .vop_nlink =            hammer_vop_nlink,
 108         .vop_nmkdir =           hammer_vop_nmkdir,
 109         .vop_nmknod =           hammer_vop_nmknod,
 110         .vop_open =             hammer_vop_open,
 111         .vop_pathconf =         hammer_vop_pathconf,
 112         .vop_print =            hammer_vop_print,
 113         .vop_readdir =          hammer_vop_readdir,
 114         .vop_readlink =         hammer_vop_readlink,
 115         .vop_nremove =          hammer_vop_nremove,
 116         .vop_nrename =          hammer_vop_nrename,
 117         .vop_nrmdir =           hammer_vop_nrmdir,
 118         .vop_setattr =          hammer_vop_setattr,
 119         .vop_strategy =         hammer_vop_strategy,
 120         .vop_nsymlink =         hammer_vop_nsymlink,
 121         .vop_nwhiteout =        hammer_vop_nwhiteout,
 122         .vop_ioctl =            hammer_vop_ioctl,
 123         .vop_mountctl =         hammer_vop_mountctl
 124 };
 125
 126 struct vop_ops hammer_spec_vops = {
 127         .vop_default =          spec_vnoperate,
 128         .vop_fsync =            hammer_vop_fsync,
 129         .vop_read =             hammer_vop_specread,
 130         .vop_write =            hammer_vop_specwrite,
 131         .vop_access =           hammer_vop_access,
 132         .vop_close =            hammer_vop_specclose,
 133         .vop_getattr =          hammer_vop_getattr,
 134         .vop_inactive =         hammer_vop_inactive,
 135         .vop_reclaim =          hammer_vop_reclaim,
 136         .vop_setattr =          hammer_vop_setattr
 137 };
 138
 139 struct vop_ops hammer_fifo_vops = {
 140         .vop_default =          fifo_vnoperate,
 141         .vop_fsync =            hammer_vop_fsync,
 142         .vop_read =             hammer_vop_fiforead,
 143         .vop_write =            hammer_vop_fifowrite,
 144         .vop_access =           hammer_vop_access,
 145         .vop_close =            hammer_vop_fifoclose,
 146         .vop_getattr =          hammer_vop_getattr,
 147         .vop_inactive =         hammer_vop_inactive,
 148         .vop_reclaim =          hammer_vop_reclaim,
 149         .vop_setattr =          hammer_vop_setattr
 150 };
 151
 152 static int hammer_dounlink(struct nchandle *nch, struct vnode *dvp,
 153                            struct ucred *cred, int flags);
 154 static int hammer_vop_strategy_read(struct vop_strategy_args *ap);
 155 static int hammer_vop_strategy_write(struct vop_strategy_args *ap);
 156
 157 #if 0
 158 static
 159 int
 160 hammer_vop_vnoperate(struct vop_generic_args *)
 161 {
 162         return (VOCALL(&hammer_vnode_vops, ap));
 163 }
 164 #endif
 165
 166 /*
 167  * hammer_vop_fsync { vp, waitfor }
 168  */
 169 static
 170 int
 171 hammer_vop_fsync(struct vop_fsync_args *ap)
 172 {
 173         hammer_inode_t ip;
 174         int error;
 175
 176         ip = VTOI(ap->a_vp);
 177         error = hammer_sync_inode(ip, ap->a_waitfor, 0);
 178         return (error);
 179 }
 180
 181 /*
 182  * hammer_vop_read { vp, uio, ioflag, cred }
 183  */
 184 static
 185 int
 186 hammer_vop_read(struct vop_read_args *ap)
 187 {
 188         struct hammer_transaction trans;
 189         hammer_inode_t ip;
 190         off_t offset;
 191         struct buf *bp;
 192         struct uio *uio;
 193         int error;
 194         int n;
 195         int seqcount;
 196
 197         if (ap->a_vp->v_type != VREG)
 198                 return (EINVAL);
 199         ip = VTOI(ap->a_vp);
 200         error = 0;
 201         seqcount = ap->a_ioflag >> 16;
 202
 203         hammer_start_transaction(&trans, ip->hmp);
 204
 205         /*
 206          * Access the data in HAMMER_BUFSIZE blocks via the buffer cache.
 207          */
 208         uio = ap->a_uio;
 209         while (uio->uio_resid > 0 && uio->uio_offset < ip->ino_rec.ino_size) {
 210                 offset = uio->uio_offset & HAMMER_BUFMASK;
 211 #if 0
 212                 error = cluster_read(ap->a_vp, ip->ino_rec.ino_size,
 213                                      uio->uio_offset - offset, HAMMER_BUFSIZE,
 214                                      MAXBSIZE, seqcount, &bp);
 215 #endif
 216                 error = bread(ap->a_vp, uio->uio_offset - offset,
 217                               HAMMER_BUFSIZE, &bp);
 218                 if (error) {
 219                         brelse(bp);
 220                         break;
 221                 }
 222                 /* bp->b_flags |= B_CLUSTEROK; temporarily disabled */
 223                 n = HAMMER_BUFSIZE - offset;
 224                 if (n > uio->uio_resid)
 225                         n = uio->uio_resid;
 226                 if (n > ip->ino_rec.ino_size - uio->uio_offset)
 227                         n = (int)(ip->ino_rec.ino_size - uio->uio_offset);
 228                 error = uiomove((char *)bp->b_data + offset, n, uio);
 229                 if (error) {
 230                         bqrelse(bp);
 231                         break;
 232                 }
 233                 if ((ip->flags & HAMMER_INODE_RO) == 0 &&
 234                     (ip->hmp->mp->mnt_flag & MNT_NOATIME) == 0) {
 235                         ip->ino_rec.ino_atime = trans.tid;
 236                         hammer_modify_inode(&trans, ip, HAMMER_INODE_ITIMES);
 237                 }
 238                 bqrelse(bp);
 239         }
 240         hammer_commit_transaction(&trans);
 241         return (error);
 242 }
 243
 244 /*
 245  * hammer_vop_write { vp, uio, ioflag, cred }
 246  */
 247 static
 248 int
 249 hammer_vop_write(struct vop_write_args *ap)
 250 {
 251         struct hammer_transaction trans;
 252         struct hammer_inode *ip;
 253         struct uio *uio;
 254         off_t offset;
 255         struct buf *bp;
 256         int error;
 257         int n;
 258         int flags;
 259
 260         if (ap->a_vp->v_type != VREG)
 261                 return (EINVAL);
 262         ip = VTOI(ap->a_vp);
 263         error = 0;
 264
 265         if (ip->flags & HAMMER_INODE_RO)
 266                 return (EROFS);
 267
 268         /*
 269          * Create a transaction to cover the operations we perform.
 270          */
 271         hammer_start_transaction(&trans, ip->hmp);
 272         uio = ap->a_uio;
 273
 274         /*
 275          * Check append mode
 276          */
 277         if (ap->a_ioflag & IO_APPEND)
 278                 uio->uio_offset = ip->ino_rec.ino_size;
 279
 280         /*
 281          * Check for illegal write offsets.  Valid range is 0...2^63-1
 282          */
 283         if (uio->uio_offset < 0 || uio->uio_offset + uio->uio_resid <= 0) {
 284                 hammer_commit_transaction(&trans);
 285                 return (EFBIG);
 286         }
 287
 288         /*
 289          * Access the data in HAMMER_BUFSIZE blocks via the buffer cache.
 290          */
 291         while (uio->uio_resid > 0) {
 292                 int fixsize = 0;
 293
 294                 offset = uio->uio_offset & HAMMER_BUFMASK;
 295                 n = HAMMER_BUFSIZE - offset;
 296                 if (n > uio->uio_resid)
 297                         n = uio->uio_resid;
 298                 if (uio->uio_offset + n > ip->ino_rec.ino_size) {
 299                         vnode_pager_setsize(ap->a_vp, uio->uio_offset + n);
 300                         fixsize = 1;
 301                 }
 302
 303                 if (uio->uio_segflg == UIO_NOCOPY) {
 304                         /*
 305                          * Issuing a write with the same data backing the
 306                          * buffer.  Instantiate the buffer to collect the
 307                          * backing vm pages, then read-in any missing bits.
 308                          *
 309                          * This case is used by vop_stdputpages().
 310                          */
 311                         bp = getblk(ap->a_vp, uio->uio_offset - offset,
 312                                     HAMMER_BUFSIZE, GETBLK_BHEAVY, 0);
 313                         if ((bp->b_flags & B_CACHE) == 0) {
 314                                 bqrelse(bp);
 315                                 error = bread(ap->a_vp,
 316                                               uio->uio_offset - offset,
 317                                               HAMMER_BUFSIZE, &bp);
 318                         }
 319                 } else if (offset == 0 && uio->uio_resid >= HAMMER_BUFSIZE) {
 320                         /*
 321                          * entirely overwrite the buffer
 322                          */
 323                         bp = getblk(ap->a_vp, uio->uio_offset - offset,
 324                                     HAMMER_BUFSIZE, GETBLK_BHEAVY, 0);
 325                 } else if (offset == 0 && uio->uio_offset >= ip->ino_rec.ino_size) {
 326                         /*
 327                          * XXX
 328                          */
 329                         bp = getblk(ap->a_vp, uio->uio_offset - offset,
 330                                     HAMMER_BUFSIZE, GETBLK_BHEAVY, 0);
 331                         vfs_bio_clrbuf(bp);
 332                 } else {
 333                         /*
 334                          * Partial overwrite, read in any missing bits then
 335                          * replace the portion being written.
 336                          */
 337                         error = bread(ap->a_vp, uio->uio_offset - offset,
 338                                       HAMMER_BUFSIZE, &bp);
 339                         if (error == 0)
 340                                 bheavy(bp);
 341                 }
 342                 if (error == 0)
 343                         error = uiomove((char *)bp->b_data + offset, n, uio);
 344
 345                 /*
 346                  * If we screwed up we have to undo any VM size changes we
 347                  * made.
 348                  */
 349                 if (error) {
 350                         brelse(bp);
 351                         if (fixsize) {
 352                                 vtruncbuf(ap->a_vp, ip->ino_rec.ino_size,
 353                                           HAMMER_BUFSIZE);
 354                         }
 355                         break;
 356                 }
 357                 /* bp->b_flags |= B_CLUSTEROK; temporarily disabled */
 358                 if (ip->ino_rec.ino_size < uio->uio_offset) {
 359                         ip->ino_rec.ino_size = uio->uio_offset;
 360                         flags = HAMMER_INODE_RDIRTY;
 361                         vnode_pager_setsize(ap->a_vp, ip->ino_rec.ino_size);
 362                 } else {
 363                         flags = 0;
 364                 }
 365                 ip->ino_rec.ino_mtime = trans.tid;
 366                 flags |= HAMMER_INODE_ITIMES | HAMMER_INODE_BUFS;
 367                 hammer_modify_inode(&trans, ip, flags);
 368
 369                 /*
 370                  * The file write must be tagged with the same TID as the
 371                  * inode, for consistency in case the inode changed size.
 372                  * This guarantees the on-disk data records will have a
 373                  * TID <= the inode TID representing the size change.
 374                  *
 375                  * If a prior write has not yet flushed, retain its TID.
 376                  */
 377                 if (bp->b_tid == 0)
 378                         bp->b_tid = ip->last_tid;
 379
 380                 if (ap->a_ioflag & IO_SYNC) {
 381                         bwrite(bp);
 382                 } else if (ap->a_ioflag & IO_DIRECT) {
 383                         bawrite(bp);
 384                 } else {
 385                         bdwrite(bp);
 386                 }
 387         }
 388         if (error)
 389                 hammer_abort_transaction(&trans);
 390         else
 391                 hammer_commit_transaction(&trans);
 392         return (error);
 393 }
 394
 395 /*
 396  * hammer_vop_access { vp, mode, cred }
 397  */
 398 static
 399 int
 400 hammer_vop_access(struct vop_access_args *ap)
 401 {
 402         struct hammer_inode *ip = VTOI(ap->a_vp);
 403         uid_t uid;
 404         gid_t gid;
 405         int error;
 406
 407         uid = hammer_to_unix_xid(&ip->ino_data.uid);
 408         gid = hammer_to_unix_xid(&ip->ino_data.gid);
 409
 410         error = vop_helper_access(ap, uid, gid, ip->ino_data.mode,
 411                                   ip->ino_data.uflags);
 412         return (error);
 413 }
 414
 415 /*
 416  * hammer_vop_advlock { vp, id, op, fl, flags }
 417  */
 418 static
 419 int
 420 hammer_vop_advlock(struct vop_advlock_args *ap)
 421 {
 422         struct hammer_inode *ip = VTOI(ap->a_vp);
 423
 424         return (lf_advlock(ap, &ip->advlock, ip->ino_rec.ino_size));
 425 }
 426
 427 /*
 428  * hammer_vop_close { vp, fflag }
 429  */
 430 static
 431 int
 432 hammer_vop_close(struct vop_close_args *ap)
 433 {
 434         return (vop_stdclose(ap));
 435 }
 436
 437 /*
 438  * hammer_vop_ncreate { nch, dvp, vpp, cred, vap }
 439  *
 440  * The operating system has already ensured that the directory entry
 441  * does not exist and done all appropriate namespace locking.
 442  */
 443 static
 444 int
 445 hammer_vop_ncreate(struct vop_ncreate_args *ap)
 446 {
 447         struct hammer_transaction trans;
 448         struct hammer_inode *dip;
 449         struct hammer_inode *nip;
 450         struct nchandle *nch;
 451         int error;
 452
 453         nch = ap->a_nch;
 454         dip = VTOI(ap->a_dvp);
 455
 456         if (dip->flags & HAMMER_INODE_RO)
 457                 return (EROFS);
 458
 459         /*
 460          * Create a transaction to cover the operations we perform.
 461          */
 462         hammer_start_transaction(&trans, dip->hmp);
 463
 464         /*
 465          * Create a new filesystem object of the requested type.  The
 466          * returned inode will be referenced but not locked.
 467          */
 468
 469         error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
 470         if (error)
 471                 kprintf("hammer_create_inode error %d\n", error);
 472         if (error) {
 473                 hammer_abort_transaction(&trans);
 474                 *ap->a_vpp = NULL;
 475                 return (error);
 476         }
 477
 478         /*
 479          * Add the new filesystem object to the directory.  This will also
 480          * bump the inode's link count.
 481          */
 482         error = hammer_ip_add_directory(&trans, dip, nch->ncp, nip);
 483         if (error)
 484                 kprintf("hammer_ip_add_directory error %d\n", error);
 485
 486         /*
 487          * Finish up.
 488          */
 489         if (error) {
 490                 hammer_rel_inode(nip, 0);
 491                 hammer_abort_transaction(&trans);
 492                 *ap->a_vpp = NULL;
 493         } else {
 494                 hammer_commit_transaction(&trans);
 495                 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
 496                 hammer_rel_inode(nip, 0);
 497                 if (error == 0) {
 498                         cache_setunresolved(ap->a_nch);
 499                         cache_setvp(ap->a_nch, *ap->a_vpp);
 500                 }
 501         }
 502         return (error);
 503 }
 504
 505 /*
 506  * hammer_vop_getattr { vp, vap }
 507  */
 508 static
 509 int
 510 hammer_vop_getattr(struct vop_getattr_args *ap)
 511 {
 512         struct hammer_inode *ip = VTOI(ap->a_vp);
 513         struct vattr *vap = ap->a_vap;
 514
 515 #if 0
 516         if (cache_check_fsmid_vp(ap->a_vp, &ip->fsmid) &&
 517             (vp->v_mount->mnt_flag & MNT_RDONLY) == 0 &&
 518             ip->obj_asof == XXX
 519         ) {
 520                 /* LAZYMOD XXX */
 521         }
 522         hammer_itimes(ap->a_vp);
 523 #endif
 524
 525         vap->va_fsid = ip->hmp->fsid_udev;
 526         vap->va_fileid = ip->ino_rec.base.base.obj_id;
 527         vap->va_mode = ip->ino_data.mode;
 528         vap->va_nlink = ip->ino_rec.ino_nlinks;
 529         vap->va_uid = hammer_to_unix_xid(&ip->ino_data.uid);
 530         vap->va_gid = hammer_to_unix_xid(&ip->ino_data.gid);
 531         vap->va_rmajor = 0;
 532         vap->va_rminor = 0;
 533         vap->va_size = ip->ino_rec.ino_size;
 534         hammer_to_timespec(ip->ino_rec.ino_atime, &vap->va_atime);
 535         hammer_to_timespec(ip->ino_rec.ino_mtime, &vap->va_mtime);
 536         hammer_to_timespec(ip->ino_data.ctime, &vap->va_ctime);
 537         vap->va_flags = ip->ino_data.uflags;
 538         vap->va_gen = 1;        /* hammer inums are unique for all time */
 539         vap->va_blocksize = 32768; /* XXX - extract from root volume */
 540         vap->va_bytes = ip->ino_rec.ino_size;
 541         vap->va_type = hammer_get_vnode_type(ip->ino_rec.base.base.obj_type);
 542         vap->va_filerev = 0;    /* XXX */
 543         /* mtime uniquely identifies any adjustments made to the file */
 544         vap->va_fsmid = ip->ino_rec.ino_mtime;
 545         vap->va_uid_uuid = ip->ino_data.uid;
 546         vap->va_gid_uuid = ip->ino_data.gid;
 547         vap->va_fsid_uuid = ip->hmp->fsid;
 548         vap->va_vaflags = VA_UID_UUID_VALID | VA_GID_UUID_VALID |
 549                           VA_FSID_UUID_VALID;
 550
 551         switch (ip->ino_rec.base.base.obj_type) {
 552         case HAMMER_OBJTYPE_CDEV:
 553         case HAMMER_OBJTYPE_BDEV:
 554                 vap->va_rmajor = ip->ino_data.rmajor;
 555                 vap->va_rminor = ip->ino_data.rminor;
 556                 break;
 557         default:
 558                 break;
 559         }
 560
 561         return(0);
 562 }
 563
 564 /*
 565  * hammer_vop_nresolve { nch, dvp, cred }
 566  *
 567  * Locate the requested directory entry.
 568  */
 569 static
 570 int
 571 hammer_vop_nresolve(struct vop_nresolve_args *ap)
 572 {
 573         struct namecache *ncp;
 574         hammer_inode_t dip;
 575         hammer_inode_t ip;
 576         hammer_tid_t asof;
 577         struct hammer_cursor cursor;
 578         union hammer_record_ondisk *rec;
 579         struct vnode *vp;
 580         int64_t namekey;
 581         int error;
 582         int i;
 583         int nlen;
 584         int flags;
 585         u_int64_t obj_id;
 586
 587         /*
 588          * Misc initialization, plus handle as-of name extensions.  Look for
 589          * the '@@' extension.  Note that as-of files and directories cannot
 590          * be modified.
 591          */
 592         dip = VTOI(ap->a_dvp);
 593         ncp = ap->a_nch->ncp;
 594         asof = dip->obj_asof;
 595         nlen = ncp->nc_nlen;
 596         flags = dip->flags;
 597
 598         for (i = 0; i < nlen; ++i) {
 599                 if (ncp->nc_name[i] == '@' && ncp->nc_name[i+1] == '@') {
 600                         asof = hammer_str_to_tid(ncp->nc_name + i + 2);
 601                         flags |= HAMMER_INODE_RO;
 602                         break;
 603                 }
 604         }
 605         nlen = i;
 606
 607         /*
 608          * If there is no path component the time extension is relative to
 609          * dip.
 610          */
 611         if (nlen == 0) {
 612                 ip = hammer_get_inode(dip->hmp, &dip->cache[1], dip->obj_id,
 613                                       asof, flags, &error);
 614                 if (error == 0) {
 615                         error = hammer_get_vnode(ip, LK_EXCLUSIVE, &vp);
 616                         hammer_rel_inode(ip, 0);
 617                 } else {
 618                         vp = NULL;
 619                 }
 620                 if (error == 0) {
 621                         vn_unlock(vp);
 622                         cache_setvp(ap->a_nch, vp);
 623                         vrele(vp);
 624                 }
 625                 return(error);
 626         }
 627
 628         /*
 629          * Calculate the namekey and setup the key range for the scan.  This
 630          * works kinda like a chained hash table where the lower 32 bits
 631          * of the namekey synthesize the chain.
 632          *
 633          * The key range is inclusive of both key_beg and key_end.
 634          */
 635         namekey = hammer_directory_namekey(ncp->nc_name, nlen);
 636
 637         error = hammer_init_cursor_hmp(&cursor, &dip->cache[0], dip->hmp);
 638         cursor.key_beg.obj_id = dip->obj_id;
 639         cursor.key_beg.key = namekey;
 640         cursor.key_beg.create_tid = 0;
 641         cursor.key_beg.delete_tid = 0;
 642         cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
 643         cursor.key_beg.obj_type = 0;
 644
 645         cursor.key_end = cursor.key_beg;
 646         cursor.key_end.key |= 0xFFFFFFFFULL;
 647         cursor.asof = asof;
 648         cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
 649
 650         /*
 651          * Scan all matching records (the chain), locate the one matching
 652          * the requested path component.
 653          *
 654          * The hammer_ip_*() functions merge in-memory records with on-disk
 655          * records for the purposes of the search.
 656          */
 657         if (error == 0)
 658                 error = hammer_ip_first(&cursor, dip);
 659
 660         rec = NULL;
 661         obj_id = 0;
 662
 663         while (error == 0) {
 664                 error = hammer_ip_resolve_data(&cursor);
 665                 if (error)
 666                         break;
 667                 rec = cursor.record;
 668                 if (nlen == rec->entry.base.data_len &&
 669                     bcmp(ncp->nc_name, cursor.data, nlen) == 0) {
 670                         obj_id = rec->entry.obj_id;
 671                         break;
 672                 }
 673                 error = hammer_ip_next(&cursor);
 674         }
 675         hammer_done_cursor(&cursor);
 676         if (error == 0) {
 677                 ip = hammer_get_inode(dip->hmp, &dip->cache[1],
 678                                       obj_id, asof, flags, &error);
 679                 if (error == 0) {
 680                         error = hammer_get_vnode(ip, LK_EXCLUSIVE, &vp);
 681                         hammer_rel_inode(ip, 0);
 682                 } else {
 683                         vp = NULL;
 684                 }
 685                 if (error == 0) {
 686                         vn_unlock(vp);
 687                         cache_setvp(ap->a_nch, vp);
 688                         vrele(vp);
 689                 }
 690         } else if (error == ENOENT) {
 691                 cache_setvp(ap->a_nch, NULL);
 692         }
 693         return (error);
 694 }
 695
 696 /*
 697  * hammer_vop_nlookupdotdot { dvp, vpp, cred }
 698  *
 699  * Locate the parent directory of a directory vnode.
 700  *
 701  * dvp is referenced but not locked.  *vpp must be returned referenced and
 702  * locked.  A parent_obj_id of 0 does not necessarily indicate that we are
 703  * at the root, instead it could indicate that the directory we were in was
 704  * removed.
 705  *
 706  * NOTE: as-of sequences are not linked into the directory structure.  If
 707  * we are at the root with a different asof then the mount point, reload
 708  * the same directory with the mount point's asof.   I'm not sure what this
 709  * will do to NFS.  We encode ASOF stamps in NFS file handles so it might not
 710  * get confused, but it hasn't been tested.
 711  */
 712 static
 713 int
 714 hammer_vop_nlookupdotdot(struct vop_nlookupdotdot_args *ap)
 715 {
 716         struct hammer_inode *dip;
 717         struct hammer_inode *ip;
 718         int64_t parent_obj_id;
 719         hammer_tid_t asof;
 720         int error;
 721
 722         dip = VTOI(ap->a_dvp);
 723         asof = dip->obj_asof;
 724         parent_obj_id = dip->ino_data.parent_obj_id;
 725
 726         if (parent_obj_id == 0) {
 727                 if (dip->obj_id == HAMMER_OBJID_ROOT &&
 728                    asof != dip->hmp->asof) {
 729                         parent_obj_id = dip->obj_id;
 730                         asof = dip->hmp->asof;
 731                         *ap->a_fakename = kmalloc(19, M_TEMP, M_WAITOK);
 732                         ksnprintf(*ap->a_fakename, 19, "0x%016llx",
 733                                    dip->obj_asof);
 734                 } else {
 735                         *ap->a_vpp = NULL;
 736                         return ENOENT;
 737                 }
 738         }
 739
 740         ip = hammer_get_inode(dip->hmp, &dip->cache[1], parent_obj_id,
 741                               asof, dip->flags, &error);
 742         if (ip == NULL) {
 743                 *ap->a_vpp = NULL;
 744                 return(error);
 745         }
 746         error = hammer_get_vnode(ip, LK_EXCLUSIVE, ap->a_vpp);
 747         hammer_rel_inode(ip, 0);
 748         return (error);
 749 }
 750
 751 /*
 752  * hammer_vop_nlink { nch, dvp, vp, cred }
 753  */
 754 static
 755 int
 756 hammer_vop_nlink(struct vop_nlink_args *ap)
 757 {
 758         struct hammer_transaction trans;
 759         struct hammer_inode *dip;
 760         struct hammer_inode *ip;
 761         struct nchandle *nch;
 762         int error;
 763
 764         nch = ap->a_nch;
 765         dip = VTOI(ap->a_dvp);
 766         ip = VTOI(ap->a_vp);
 767
 768         if (dip->flags & HAMMER_INODE_RO)
 769                 return (EROFS);
 770         if (ip->flags & HAMMER_INODE_RO)
 771                 return (EROFS);
 772
 773         /*
 774          * Create a transaction to cover the operations we perform.
 775          */
 776         hammer_start_transaction(&trans, dip->hmp);
 777
 778         /*
 779          * Add the filesystem object to the directory.  Note that neither
 780          * dip nor ip are referenced or locked, but their vnodes are
 781          * referenced.  This function will bump the inode's link count.
 782          */
 783         error = hammer_ip_add_directory(&trans, dip, nch->ncp, ip);
 784
 785         /*
 786          * Finish up.
 787          */
 788         if (error) {
 789                 hammer_abort_transaction(&trans);
 790         } else {
 791                 cache_setunresolved(nch);
 792                 cache_setvp(nch, ap->a_vp);
 793                 hammer_commit_transaction(&trans);
 794         }
 795         return (error);
 796 }
 797
 798 /*
 799  * hammer_vop_nmkdir { nch, dvp, vpp, cred, vap }
 800  *
 801  * The operating system has already ensured that the directory entry
 802  * does not exist and done all appropriate namespace locking.
 803  */
 804 static
 805 int
 806 hammer_vop_nmkdir(struct vop_nmkdir_args *ap)
 807 {
 808         struct hammer_transaction trans;
 809         struct hammer_inode *dip;
 810         struct hammer_inode *nip;
 811         struct nchandle *nch;
 812         int error;
 813
 814         nch = ap->a_nch;
 815         dip = VTOI(ap->a_dvp);
 816
 817         if (dip->flags & HAMMER_INODE_RO)
 818                 return (EROFS);
 819
 820         /*
 821          * Create a transaction to cover the operations we perform.
 822          */
 823         hammer_start_transaction(&trans, dip->hmp);
 824
 825         /*
 826          * Create a new filesystem object of the requested type.  The
 827          * returned inode will be referenced but not locked.
 828          */
 829         error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
 830         if (error)
 831                 kprintf("hammer_mkdir error %d\n", error);
 832         if (error) {
 833                 hammer_abort_transaction(&trans);
 834                 *ap->a_vpp = NULL;
 835                 return (error);
 836         }
 837
 838         /*
 839          * Add the new filesystem object to the directory.  This will also
 840          * bump the inode's link count.
 841          */
 842         error = hammer_ip_add_directory(&trans, dip, nch->ncp, nip);
 843         if (error)
 844                 kprintf("hammer_mkdir (add) error %d\n", error);
 845
 846         /*
 847          * Finish up.
 848          */
 849         if (error) {
 850                 hammer_rel_inode(nip, 0);
 851                 hammer_abort_transaction(&trans);
 852                 *ap->a_vpp = NULL;
 853         } else {
 854                 hammer_commit_transaction(&trans);
 855                 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
 856                 hammer_rel_inode(nip, 0);
 857                 if (error == 0) {
 858                         cache_setunresolved(ap->a_nch);
 859                         cache_setvp(ap->a_nch, *ap->a_vpp);
 860                 }
 861         }
 862         return (error);
 863 }
 864
 865 /*
 866  * hammer_vop_nmknod { nch, dvp, vpp, cred, vap }
 867  *
 868  * The operating system has already ensured that the directory entry
 869  * does not exist and done all appropriate namespace locking.
 870  */
 871 static
 872 int
 873 hammer_vop_nmknod(struct vop_nmknod_args *ap)
 874 {
 875         struct hammer_transaction trans;
 876         struct hammer_inode *dip;
 877         struct hammer_inode *nip;
 878         struct nchandle *nch;
 879         int error;
 880
 881         nch = ap->a_nch;
 882         dip = VTOI(ap->a_dvp);
 883
 884         if (dip->flags & HAMMER_INODE_RO)
 885                 return (EROFS);
 886
 887         /*
 888          * Create a transaction to cover the operations we perform.
 889          */
 890         hammer_start_transaction(&trans, dip->hmp);
 891
 892         /*
 893          * Create a new filesystem object of the requested type.  The
 894          * returned inode will be referenced but not locked.
 895          */
 896         error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
 897         if (error) {
 898                 hammer_abort_transaction(&trans);
 899                 *ap->a_vpp = NULL;
 900                 return (error);
 901         }
 902
 903         /*
 904          * Add the new filesystem object to the directory.  This will also
 905          * bump the inode's link count.
 906          */
 907         error = hammer_ip_add_directory(&trans, dip, nch->ncp, nip);
 908
 909         /*
 910          * Finish up.
 911          */
 912         if (error) {
 913                 hammer_rel_inode(nip, 0);
 914                 hammer_abort_transaction(&trans);
 915                 *ap->a_vpp = NULL;
 916         } else {
 917                 hammer_commit_transaction(&trans);
 918                 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
 919                 hammer_rel_inode(nip, 0);
 920                 if (error == 0) {
 921                         cache_setunresolved(ap->a_nch);
 922                         cache_setvp(ap->a_nch, *ap->a_vpp);
 923                 }
 924         }
 925         return (error);
 926 }
 927
 928 /*
 929  * hammer_vop_open { vp, mode, cred, fp }
 930  */
 931 static
 932 int
 933 hammer_vop_open(struct vop_open_args *ap)
 934 {
 935         if ((ap->a_mode & FWRITE) && (VTOI(ap->a_vp)->flags & HAMMER_INODE_RO))
 936                 return (EROFS);
 937
 938         return(vop_stdopen(ap));
 939 }
 940
 941 /*
 942  * hammer_vop_pathconf { vp, name, retval }
 943  */
 944 static
 945 int
 946 hammer_vop_pathconf(struct vop_pathconf_args *ap)
 947 {
 948         return EOPNOTSUPP;
 949 }
 950
 951 /*
 952  * hammer_vop_print { vp }
 953  */
 954 static
 955 int
 956 hammer_vop_print(struct vop_print_args *ap)
 957 {
 958         return EOPNOTSUPP;
 959 }
 960
 961 /*
 962  * hammer_vop_readdir { vp, uio, cred, *eofflag, *ncookies, off_t **cookies }
 963  */
 964 static
 965 int
 966 hammer_vop_readdir(struct vop_readdir_args *ap)
 967 {
 968         struct hammer_cursor cursor;
 969         struct hammer_inode *ip;
 970         struct uio *uio;
 971         hammer_record_ondisk_t rec;
 972         hammer_base_elm_t base;
 973         int error;
 974         int cookie_index;
 975         int ncookies;
 976         off_t *cookies;
 977         off_t saveoff;
 978         int r;
 979
 980         ip = VTOI(ap->a_vp);
 981         uio = ap->a_uio;
 982         saveoff = uio->uio_offset;
 983
 984         if (ap->a_ncookies) {
 985                 ncookies = uio->uio_resid / 16 + 1;
 986                 if (ncookies > 1024)
 987                         ncookies = 1024;
 988                 cookies = kmalloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
 989                 cookie_index = 0;
 990         } else {
 991                 ncookies = -1;
 992                 cookies = NULL;
 993                 cookie_index = 0;
 994         }
 995
 996         /*
 997          * Handle artificial entries
 998          */
 999         error = 0;
1000         if (saveoff == 0) {
1001                 r = vop_write_dirent(&error, uio, ip->obj_id, DT_DIR, 1, ".");
1002                 if (r)
1003                         goto done;
1004                 if (cookies)
1005                         cookies[cookie_index] = saveoff;
1006                 ++saveoff;
1007                 ++cookie_index;
1008                 if (cookie_index == ncookies)
1009                         goto done;
1010         }
1011         if (saveoff == 1) {
1012                 if (ip->ino_data.parent_obj_id) {
1013                         r = vop_write_dirent(&error, uio,
1014                                              ip->ino_data.parent_obj_id,
1015                                              DT_DIR, 2, "..");
1016                 } else {
1017                         r = vop_write_dirent(&error, uio,
1018                                              ip->obj_id, DT_DIR, 2, "..");
1019                 }
1020                 if (r)
1021                         goto done;
1022                 if (cookies)
1023                         cookies[cookie_index] = saveoff;
1024                 ++saveoff;
1025                 ++cookie_index;
1026                 if (cookie_index == ncookies)
1027                         goto done;
1028         }
1029
1030         /*
1031          * Key range (begin and end inclusive) to scan.  Directory keys
1032          * directly translate to a 64 bit 'seek' position.
1033          */
1034         hammer_init_cursor_hmp(&cursor, &ip->cache[0], ip->hmp);
1035         cursor.key_beg.obj_id = ip->obj_id;
1036         cursor.key_beg.create_tid = 0;
1037         cursor.key_beg.delete_tid = 0;
1038         cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1039         cursor.key_beg.obj_type = 0;
1040         cursor.key_beg.key = saveoff;
1041
1042         cursor.key_end = cursor.key_beg;
1043         cursor.key_end.key = HAMMER_MAX_KEY;
1044         cursor.asof = ip->obj_asof;
1045         cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1046
1047         error = hammer_ip_first(&cursor, ip);
1048
1049         while (error == 0) {
1050                 error = hammer_ip_resolve_record_and_data(&cursor);
1051                 if (error)
1052                         break;
1053                 rec = cursor.record;
1054                 base = &rec->base.base;
1055                 saveoff = base->key;
1056
1057                 if (base->obj_id != ip->obj_id)
1058                         panic("readdir: bad record at %p", cursor.node);
1059
1060                 r = vop_write_dirent(
1061                              &error, uio, rec->entry.obj_id,
1062                              hammer_get_dtype(rec->entry.base.base.obj_type),
1063                              rec->entry.base.data_len,
1064                              (void *)cursor.data);
1065                 if (r)
1066                         break;
1067                 ++saveoff;
1068                 if (cookies)
1069                         cookies[cookie_index] = base->key;
1070                 ++cookie_index;
1071                 if (cookie_index == ncookies)
1072                         break;
1073                 error = hammer_ip_next(&cursor);
1074         }
1075         hammer_done_cursor(&cursor);
1076
1077 done:
1078         if (ap->a_eofflag)
1079                 *ap->a_eofflag = (error == ENOENT);
1080         uio->uio_offset = saveoff;
1081         if (error && cookie_index == 0) {
1082                 if (error == ENOENT)
1083                         error = 0;
1084                 if (cookies) {
1085                         kfree(cookies, M_TEMP);
1086                         *ap->a_ncookies = 0;
1087                         *ap->a_cookies = NULL;
1088                 }
1089         } else {
1090                 if (error == ENOENT)
1091                         error = 0;
1092                 if (cookies) {
1093                         *ap->a_ncookies = cookie_index;
1094                         *ap->a_cookies = cookies;
1095                 }
1096         }
1097         return(error);
1098 }
1099
1100 /*
1101  * hammer_vop_readlink { vp, uio, cred }
1102  */
1103 static
1104 int
1105 hammer_vop_readlink(struct vop_readlink_args *ap)
1106 {
1107         struct hammer_cursor cursor;
1108         struct hammer_inode *ip;
1109         int error;
1110
1111         ip = VTOI(ap->a_vp);
1112         hammer_init_cursor_hmp(&cursor, &ip->cache[0], ip->hmp);
1113
1114         /*
1115          * Key range (begin and end inclusive) to scan.  Directory keys
1116          * directly translate to a 64 bit 'seek' position.
1117          */
1118         cursor.key_beg.obj_id = ip->obj_id;
1119         cursor.key_beg.create_tid = 0;
1120         cursor.key_beg.delete_tid = 0;
1121         cursor.key_beg.rec_type = HAMMER_RECTYPE_FIX;
1122         cursor.key_beg.obj_type = 0;
1123         cursor.key_beg.key = HAMMER_FIXKEY_SYMLINK;
1124         cursor.asof = ip->obj_asof;
1125         cursor.flags |= HAMMER_CURSOR_ASOF;
1126
1127         error = hammer_ip_lookup(&cursor, ip);
1128         if (error == 0) {
1129                 error = hammer_ip_resolve_data(&cursor);
1130                 if (error == 0) {
1131                         error = uiomove((char *)cursor.data,
1132                                         cursor.record->base.data_len,
1133                                         ap->a_uio);
1134                 }
1135         }
1136         hammer_done_cursor(&cursor);
1137         return(error);
1138 }
1139
1140 /*
1141  * hammer_vop_nremove { nch, dvp, cred }
1142  */
1143 static
1144 int
1145 hammer_vop_nremove(struct vop_nremove_args *ap)
1146 {
1147         return(hammer_dounlink(ap->a_nch, ap->a_dvp, ap->a_cred, 0));
1148 }
1149
1150 /*
1151  * hammer_vop_nrename { fnch, tnch, fdvp, tdvp, cred }
1152  */
1153 static
1154 int
1155 hammer_vop_nrename(struct vop_nrename_args *ap)
1156 {
1157         struct hammer_transaction trans;
1158         struct namecache *fncp;
1159         struct namecache *tncp;
1160         struct hammer_inode *fdip;
1161         struct hammer_inode *tdip;
1162         struct hammer_inode *ip;
1163         struct hammer_cursor cursor;
1164         union hammer_record_ondisk *rec;
1165         int64_t namekey;
1166         int error;
1167
1168         fdip = VTOI(ap->a_fdvp);
1169         tdip = VTOI(ap->a_tdvp);
1170         fncp = ap->a_fnch->ncp;
1171         tncp = ap->a_tnch->ncp;
1172         ip = VTOI(fncp->nc_vp);
1173         KKASSERT(ip != NULL);
1174
1175         if (fdip->flags & HAMMER_INODE_RO)
1176                 return (EROFS);
1177         if (tdip->flags & HAMMER_INODE_RO)
1178                 return (EROFS);
1179         if (ip->flags & HAMMER_INODE_RO)
1180                 return (EROFS);
1181
1182         hammer_start_transaction(&trans, fdip->hmp);
1183
1184         /*
1185          * Remove tncp from the target directory and then link ip as
1186          * tncp. XXX pass trans to dounlink
1187          *
1188          * Force the inode sync-time to match the transaction so it is
1189          * in-sync with the creation of the target directory entry.
1190          */
1191         error = hammer_dounlink(ap->a_tnch, ap->a_tdvp, ap->a_cred, 0);
1192         if (error == 0 || error == ENOENT) {
1193                 error = hammer_ip_add_directory(&trans, tdip, tncp, ip);
1194                 if (error == 0) {
1195                         ip->ino_data.parent_obj_id = tdip->obj_id;
1196                         hammer_modify_inode(&trans, ip,
1197                                 HAMMER_INODE_DDIRTY | HAMMER_INODE_TIDLOCKED);
1198                 }
1199         }
1200         if (error)
1201                 goto failed; /* XXX */
1202
1203         /*
1204          * Locate the record in the originating directory and remove it.
1205          *
1206          * Calculate the namekey and setup the key range for the scan.  This
1207          * works kinda like a chained hash table where the lower 32 bits
1208          * of the namekey synthesize the chain.
1209          *
1210          * The key range is inclusive of both key_beg and key_end.
1211          */
1212         namekey = hammer_directory_namekey(fncp->nc_name, fncp->nc_nlen);
1213 retry:
1214         hammer_init_cursor_hmp(&cursor, &fdip->cache[0], fdip->hmp);
1215         cursor.key_beg.obj_id = fdip->obj_id;
1216         cursor.key_beg.key = namekey;
1217         cursor.key_beg.create_tid = 0;
1218         cursor.key_beg.delete_tid = 0;
1219         cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1220         cursor.key_beg.obj_type = 0;
1221
1222         cursor.key_end = cursor.key_beg;
1223         cursor.key_end.key |= 0xFFFFFFFFULL;
1224         cursor.asof = fdip->obj_asof;
1225         cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1226
1227         /*
1228          * Scan all matching records (the chain), locate the one matching
1229          * the requested path component.
1230          *
1231          * The hammer_ip_*() functions merge in-memory records with on-disk
1232          * records for the purposes of the search.
1233          */
1234         error = hammer_ip_first(&cursor, fdip);
1235         while (error == 0) {
1236                 if (hammer_ip_resolve_data(&cursor) != 0)
1237                         break;
1238                 rec = cursor.record;
1239                 if (fncp->nc_nlen == rec->entry.base.data_len &&
1240                     bcmp(fncp->nc_name, cursor.data, fncp->nc_nlen) == 0) {
1241                         break;
1242                 }
1243                 error = hammer_ip_next(&cursor);
1244         }
1245
1246         /*
1247          * If all is ok we have to get the inode so we can adjust nlinks.
1248          *
1249          * WARNING: hammer_ip_del_directory() may have to terminate the
1250          * cursor to avoid a recursion.  It's ok to call hammer_done_cursor()
1251          * twice.
1252          */
1253         if (error == 0)
1254                 error = hammer_ip_del_directory(&trans, &cursor, fdip, ip);
1255         hammer_done_cursor(&cursor);
1256         if (error == 0)
1257                 cache_rename(ap->a_fnch, ap->a_tnch);
1258         if (error == EDEADLK)
1259                 goto retry;
1260 failed:
1261         if (error == 0) {
1262                 hammer_commit_transaction(&trans);
1263         } else {
1264                 hammer_abort_transaction(&trans);
1265         }
1266         return (error);
1267 }
1268
1269 /*
1270  * hammer_vop_nrmdir { nch, dvp, cred }
1271  */
1272 static
1273 int
1274 hammer_vop_nrmdir(struct vop_nrmdir_args *ap)
1275 {
1276         return(hammer_dounlink(ap->a_nch, ap->a_dvp, ap->a_cred, 0));
1277 }
1278
1279 /*
1280  * hammer_vop_setattr { vp, vap, cred }
1281  */
1282 static
1283 int
1284 hammer_vop_setattr(struct vop_setattr_args *ap)
1285 {
1286         struct hammer_transaction trans;
1287         struct vattr *vap;
1288         struct hammer_inode *ip;
1289         int modflags;
1290         int error;
1291         int truncating;
1292         int64_t aligned_size;
1293         u_int32_t flags;
1294         uuid_t uuid;
1295
1296         vap = ap->a_vap;
1297         ip = ap->a_vp->v_data;
1298         modflags = 0;
1299
1300         if (ap->a_vp->v_mount->mnt_flag & MNT_RDONLY)
1301                 return(EROFS);
1302         if (ip->flags & HAMMER_INODE_RO)
1303                 return (EROFS);
1304
1305         hammer_start_transaction(&trans, ip->hmp);
1306         error = 0;
1307
1308         if (vap->va_flags != VNOVAL) {
1309                 flags = ip->ino_data.uflags;
1310                 error = vop_helper_setattr_flags(&flags, vap->va_flags,
1311                                          hammer_to_unix_xid(&ip->ino_data.uid),
1312                                          ap->a_cred);
1313                 if (error == 0) {
1314                         if (ip->ino_data.uflags != flags) {
1315                                 ip->ino_data.uflags = flags;
1316                                 modflags |= HAMMER_INODE_DDIRTY;
1317                         }
1318                         if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
1319                                 error = 0;
1320                                 goto done;
1321                         }
1322                 }
1323                 goto done;
1324         }
1325         if (ip->ino_data.uflags & (IMMUTABLE | APPEND)) {
1326                 error = EPERM;
1327                 goto done;
1328         }
1329         if (vap->va_uid != (uid_t)VNOVAL) {
1330                 hammer_guid_to_uuid(&uuid, vap->va_uid);
1331                 if (bcmp(&uuid, &ip->ino_data.uid, sizeof(uuid)) != 0) {
1332                         ip->ino_data.uid = uuid;
1333                         modflags |= HAMMER_INODE_DDIRTY;
1334                 }
1335         }
1336         if (vap->va_gid != (uid_t)VNOVAL) {
1337                 hammer_guid_to_uuid(&uuid, vap->va_gid);
1338                 if (bcmp(&uuid, &ip->ino_data.gid, sizeof(uuid)) != 0) {
1339                         ip->ino_data.gid = uuid;
1340                         modflags |= HAMMER_INODE_DDIRTY;
1341                 }
1342         }
1343         while (vap->va_size != VNOVAL && ip->ino_rec.ino_size != vap->va_size) {
1344                 switch(ap->a_vp->v_type) {
1345                 case VREG:
1346                         if (vap->va_size == ip->ino_rec.ino_size)
1347                                 break;
1348                         if (vap->va_size < ip->ino_rec.ino_size) {
1349                                 vtruncbuf(ap->a_vp, vap->va_size,
1350                                           HAMMER_BUFSIZE);
1351                                 truncating = 1;
1352                         } else {
1353                                 vnode_pager_setsize(ap->a_vp, vap->va_size);
1354                                 truncating = 0;
1355                         }
1356                         ip->ino_rec.ino_size = vap->va_size;
1357                         modflags |= HAMMER_INODE_RDIRTY;
1358                         aligned_size = (vap->va_size + HAMMER_BUFMASK) &
1359                                         ~(int64_t)HAMMER_BUFMASK;
1360
1361                         if (truncating) {
1362                                 error = hammer_ip_delete_range(&trans, ip,
1363                                                     aligned_size,
1364                                                     0x7FFFFFFFFFFFFFFFLL);
1365                         }
1366                         /*
1367                          * If truncating we have to clean out a portion of
1368                          * the last block on-disk.
1369                          */
1370                         if (truncating && error == 0 &&
1371                             vap->va_size < aligned_size) {
1372                                 struct buf *bp;
1373                                 int offset;
1374
1375                                 offset = vap->va_size & HAMMER_BUFMASK;
1376                                 error = bread(ap->a_vp,
1377                                               aligned_size - HAMMER_BUFSIZE,
1378                                               HAMMER_BUFSIZE, &bp);
1379                                 if (error == 0) {
1380                                         bzero(bp->b_data + offset,
1381                                               HAMMER_BUFSIZE - offset);
1382                                         bdwrite(bp);
1383                                 } else {
1384                                         brelse(bp);
1385                                 }
1386                         }
1387                         break;
1388                 case VDATABASE:
1389                         error = hammer_ip_delete_range(&trans, ip,
1390                                                     vap->va_size,
1391                                                     0x7FFFFFFFFFFFFFFFLL);
1392                         ip->ino_rec.ino_size = vap->va_size;
1393                         modflags |= HAMMER_INODE_RDIRTY;
1394                         break;
1395                 default:
1396                         error = EINVAL;
1397                         goto done;
1398                 }
1399                 break;
1400         }
1401         if (vap->va_atime.tv_sec != VNOVAL) {
1402                 ip->ino_rec.ino_atime =
1403                         hammer_timespec_to_transid(&vap->va_atime);
1404                 modflags |= HAMMER_INODE_ITIMES;
1405         }
1406         if (vap->va_mtime.tv_sec != VNOVAL) {
1407                 ip->ino_rec.ino_mtime =
1408                         hammer_timespec_to_transid(&vap->va_mtime);
1409                 modflags |= HAMMER_INODE_ITIMES;
1410         }
1411         if (vap->va_mode != (mode_t)VNOVAL) {
1412                 if (ip->ino_data.mode != vap->va_mode) {
1413                         ip->ino_data.mode = vap->va_mode;
1414                         modflags |= HAMMER_INODE_DDIRTY;
1415                 }
1416         }
1417 done:
1418         if (error) {
1419                 hammer_abort_transaction(&trans);
1420         } else {
1421                 hammer_modify_inode(&trans, ip, modflags);
1422                 hammer_commit_transaction(&trans);
1423         }
1424         return (error);
1425 }
1426
1427 /*
1428  * hammer_vop_nsymlink { nch, dvp, vpp, cred, vap, target }
1429  */
1430 static
1431 int
1432 hammer_vop_nsymlink(struct vop_nsymlink_args *ap)
1433 {
1434         struct hammer_transaction trans;
1435         struct hammer_inode *dip;
1436         struct hammer_inode *nip;
1437         struct nchandle *nch;
1438         hammer_record_t record;
1439         int error;
1440         int bytes;
1441
1442         ap->a_vap->va_type = VLNK;
1443
1444         nch = ap->a_nch;
1445         dip = VTOI(ap->a_dvp);
1446
1447         if (dip->flags & HAMMER_INODE_RO)
1448                 return (EROFS);
1449
1450         /*
1451          * Create a transaction to cover the operations we perform.
1452          */
1453         hammer_start_transaction(&trans, dip->hmp);
1454
1455         /*
1456          * Create a new filesystem object of the requested type.  The
1457          * returned inode will be referenced but not locked.
1458          */
1459
1460         error = hammer_create_inode(&trans, ap->a_vap, ap->a_cred, dip, &nip);
1461         if (error) {
1462                 hammer_abort_transaction(&trans);
1463                 *ap->a_vpp = NULL;
1464                 return (error);
1465         }
1466
1467         /*
1468          * Add the new filesystem object to the directory.  This will also
1469          * bump the inode's link count.
1470          */
1471         error = hammer_ip_add_directory(&trans, dip, nch->ncp, nip);
1472
1473         /*
1474          * Add a record representing the symlink.  symlink stores the link
1475          * as pure data, not a string, and is no \0 terminated.
1476          */
1477         if (error == 0) {
1478                 record = hammer_alloc_mem_record(nip);
1479                 bytes = strlen(ap->a_target);
1480
1481                 record->rec.base.base.key = HAMMER_FIXKEY_SYMLINK;
1482                 record->rec.base.base.rec_type = HAMMER_RECTYPE_FIX;
1483                 record->rec.base.data_len = bytes;
1484                 record->data = (void *)ap->a_target;
1485                 /* will be reallocated by routine below */
1486                 error = hammer_ip_add_record(&trans, record);
1487
1488                 /*
1489                  * Set the file size to the length of the link.
1490                  */
1491                 if (error == 0) {
1492                         nip->ino_rec.ino_size = bytes;
1493                         hammer_modify_inode(&trans, nip, HAMMER_INODE_RDIRTY);
1494                 }
1495         }
1496
1497         /*
1498          * Finish up.
1499          */
1500         if (error) {
1501                 hammer_rel_inode(nip, 0);
1502                 hammer_abort_transaction(&trans);
1503                 *ap->a_vpp = NULL;
1504         } else {
1505                 hammer_commit_transaction(&trans);
1506                 error = hammer_get_vnode(nip, LK_EXCLUSIVE, ap->a_vpp);
1507                 hammer_rel_inode(nip, 0);
1508                 if (error == 0) {
1509                         cache_setunresolved(ap->a_nch);
1510                         cache_setvp(ap->a_nch, *ap->a_vpp);
1511                 }
1512         }
1513         return (error);
1514 }
1515
1516 /*
1517  * hammer_vop_nwhiteout { nch, dvp, cred, flags }
1518  */
1519 static
1520 int
1521 hammer_vop_nwhiteout(struct vop_nwhiteout_args *ap)
1522 {
1523         return(hammer_dounlink(ap->a_nch, ap->a_dvp, ap->a_cred, ap->a_flags));
1524 }
1525
1526 /*
1527  * hammer_vop_ioctl { vp, command, data, fflag, cred }
1528  */
1529 static
1530 int
1531 hammer_vop_ioctl(struct vop_ioctl_args *ap)
1532 {
1533         struct hammer_inode *ip = ap->a_vp->v_data;
1534
1535         return(hammer_ioctl(ip, ap->a_command, ap->a_data,
1536                             ap->a_fflag, ap->a_cred));
1537 }
1538
1539 static
1540 int
1541 hammer_vop_mountctl(struct vop_mountctl_args *ap)
1542 {
1543         struct mount *mp;
1544         int error;
1545
1546         mp = ap->a_head.a_ops->head.vv_mount;
1547
1548         switch(ap->a_op) {
1549         case MOUNTCTL_SET_EXPORT:
1550                 if (ap->a_ctllen != sizeof(struct export_args))
1551                         error = EINVAL;
1552                 error = hammer_vfs_export(mp, ap->a_op,
1553                                       (const struct export_args *)ap->a_ctl);
1554                 break;
1555         default:
1556                 error = journal_mountctl(ap);
1557                 break;
1558         }
1559         return(error);
1560 }
1561
1562 /*
1563  * hammer_vop_strategy { vp, bio }
1564  *
1565  * Strategy call, used for regular file read & write only.  Note that the
1566  * bp may represent a cluster.
1567  *
1568  * To simplify operation and allow better optimizations in the future,
1569  * this code does not make any assumptions with regards to buffer alignment
1570  * or size.
1571  */
1572 static
1573 int
1574 hammer_vop_strategy(struct vop_strategy_args *ap)
1575 {
1576         struct buf *bp;
1577         int error;
1578
1579         bp = ap->a_bio->bio_buf;
1580
1581         switch(bp->b_cmd) {
1582         case BUF_CMD_READ:
1583                 error = hammer_vop_strategy_read(ap);
1584                 break;
1585         case BUF_CMD_WRITE:
1586                 error = hammer_vop_strategy_write(ap);
1587                 break;
1588         default:
1589                 error = EINVAL;
1590                 break;
1591         }
1592         bp->b_error = error;
1593         if (error)
1594                 bp->b_flags |= B_ERROR;
1595         biodone(ap->a_bio);
1596         return (error);
1597 }
1598
1599 /*
1600  * Read from a regular file.  Iterate the related records and fill in the
1601  * BIO/BUF.  Gaps are zero-filled.
1602  *
1603  * The support code in hammer_object.c should be used to deal with mixed
1604  * in-memory and on-disk records.
1605  *
1606  * XXX atime update
1607  */
1608 static
1609 int
1610 hammer_vop_strategy_read(struct vop_strategy_args *ap)
1611 {
1612         struct hammer_inode *ip = ap->a_vp->v_data;
1613         struct hammer_cursor cursor;
1614         hammer_record_ondisk_t rec;
1615         hammer_base_elm_t base;
1616         struct bio *bio;
1617         struct buf *bp;
1618         int64_t rec_offset;
1619         int64_t ran_end;
1620         int64_t tmp64;
1621         int error;
1622         int boff;
1623         int roff;
1624         int n;
1625
1626         bio = ap->a_bio;
1627         bp = bio->bio_buf;
1628
1629         hammer_init_cursor_hmp(&cursor, &ip->cache[0], ip->hmp);
1630
1631         /*
1632          * Key range (begin and end inclusive) to scan.  Note that the key's
1633          * stored in the actual records represent BASE+LEN, not BASE.  The
1634          * first record containing bio_offset will have a key > bio_offset.
1635          */
1636         cursor.key_beg.obj_id = ip->obj_id;
1637         cursor.key_beg.create_tid = 0;
1638         cursor.key_beg.delete_tid = 0;
1639         cursor.key_beg.obj_type = 0;
1640         cursor.key_beg.key = bio->bio_offset + 1;
1641         cursor.asof = ip->obj_asof;
1642         cursor.flags |= HAMMER_CURSOR_ASOF | HAMMER_CURSOR_DATAEXTOK;
1643
1644         cursor.key_end = cursor.key_beg;
1645         if (ip->ino_rec.base.base.obj_type == HAMMER_OBJTYPE_DBFILE) {
1646                 cursor.key_beg.rec_type = HAMMER_RECTYPE_DB;
1647                 cursor.key_end.rec_type = HAMMER_RECTYPE_DB;
1648                 cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
1649         } else {
1650                 ran_end = bio->bio_offset + bp->b_bufsize;
1651                 cursor.key_beg.rec_type = HAMMER_RECTYPE_DATA;
1652                 cursor.key_end.rec_type = HAMMER_RECTYPE_DATA;
1653                 tmp64 = ran_end + MAXPHYS + 1;  /* work-around GCC-4 bug */
1654                 if (tmp64 < ran_end)
1655                         cursor.key_end.key = 0x7FFFFFFFFFFFFFFFLL;
1656                 else
1657                         cursor.key_end.key = ran_end + MAXPHYS + 1;
1658         }
1659         cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE;
1660
1661         error = hammer_ip_first(&cursor, ip);
1662         boff = 0;
1663
1664         while (error == 0) {
1665                 error = hammer_ip_resolve_data(&cursor);
1666                 if (error)
1667                         break;
1668                 rec = cursor.record;
1669                 base = &rec->base.base;
1670
1671                 rec_offset = base->key - rec->data.base.data_len;
1672
1673                 /*
1674                  * Calculate the gap, if any, and zero-fill it.
1675                  */
1676                 n = (int)(rec_offset - (bio->bio_offset + boff));
1677                 if (n > 0) {
1678                         if (n > bp->b_bufsize - boff)
1679                                 n = bp->b_bufsize - boff;
1680                         bzero((char *)bp->b_data + boff, n);
1681                         boff += n;
1682                         n = 0;
1683                 }
1684
1685                 /*
1686                  * Calculate the data offset in the record and the number
1687                  * of bytes we can copy.
1688                  *
1689                  * Note there is a degenerate case here where boff may
1690                  * already be at bp->b_bufsize.
1691                  */
1692                 roff = -n;
1693                 n = rec->data.base.data_len - roff;
1694                 KKASSERT(n > 0);
1695                 if (n > bp->b_bufsize - boff)
1696                         n = bp->b_bufsize - boff;
1697                 bcopy((char *)cursor.data + roff,
1698                       (char *)bp->b_data + boff, n);
1699                 boff += n;
1700                 if (boff == bp->b_bufsize)
1701                         break;
1702                 error = hammer_ip_next(&cursor);
1703         }
1704         hammer_done_cursor(&cursor);
1705
1706         /*
1707          * There may have been a gap after the last record
1708          */
1709         if (error == ENOENT)
1710                 error = 0;
1711         if (error == 0 && boff != bp->b_bufsize) {
1712                 KKASSERT(boff < bp->b_bufsize);
1713                 bzero((char *)bp->b_data + boff, bp->b_bufsize - boff);
1714                 /* boff = bp->b_bufsize; */
1715         }
1716         bp->b_resid = 0;
1717         return(error);
1718 }
1719
1720 /*
1721  * Write to a regular file.  Iterate the related records and mark for
1722  * deletion.  If existing edge records (left and right side) overlap our
1723  * write they have to be marked deleted and new records created, usually
1724  * referencing a portion of the original data.  Then add a record to
1725  * represent the buffer.
1726  *
1727  * The support code in hammer_object.c should be used to deal with mixed
1728  * in-memory and on-disk records.
1729  */
1730 static
1731 int
1732 hammer_vop_strategy_write(struct vop_strategy_args *ap)
1733 {
1734         struct hammer_transaction trans;
1735         hammer_inode_t ip;
1736         struct bio *bio;
1737         struct buf *bp;
1738         int error;
1739
1740         bio = ap->a_bio;
1741         bp = bio->bio_buf;
1742         ip = ap->a_vp->v_data;
1743
1744         if (ip->flags & HAMMER_INODE_RO)
1745                 return (EROFS);
1746
1747         /*
1748          * Start a transaction using the TID stored with the bp.
1749          */
1750         KKASSERT(bp->b_tid != 0);
1751         hammer_start_transaction_tid(&trans, ip->hmp, bp->b_tid);
1752
1753         /*
1754          * Delete any records overlapping our range.  This function will
1755          * (eventually) properly truncate partial overlaps.
1756          */
1757         if (ip->ino_rec.base.base.obj_type == HAMMER_OBJTYPE_DBFILE) {
1758                 error = hammer_ip_delete_range(&trans, ip, bio->bio_offset,
1759                                                bio->bio_offset);
1760         } else {
1761                 error = hammer_ip_delete_range(&trans, ip, bio->bio_offset,
1762                                                bio->bio_offset +
1763                                                 bp->b_bufsize - 1);
1764         }
1765
1766         /*
1767          * Add a single record to cover the write
1768          */
1769         if (error == 0) {
1770                 error = hammer_ip_sync_data(&trans, ip, bio->bio_offset,
1771                                             bp->b_data, bp->b_bufsize);
1772         }
1773
1774         /*
1775          * If an error occured abort the transaction
1776          */
1777         if (error) {
1778                 /* XXX undo deletion */
1779                 hammer_abort_transaction(&trans);
1780                 bp->b_resid = bp->b_bufsize;
1781         } else {
1782                 hammer_commit_transaction(&trans);
1783                 bp->b_resid = 0;
1784                 bp->b_tid = 0;
1785         }
1786         return(error);
1787 }
1788
1789 /*
1790  * dounlink - disconnect a directory entry
1791  *
1792  * XXX whiteout support not really in yet
1793  */
1794 static int
1795 hammer_dounlink(struct nchandle *nch, struct vnode *dvp, struct ucred *cred,
1796                 int flags)
1797 {
1798         struct hammer_transaction trans;
1799         struct namecache *ncp;
1800         hammer_inode_t dip;
1801         hammer_inode_t ip;
1802         hammer_record_ondisk_t rec;
1803         struct hammer_cursor cursor;
1804         int64_t namekey;
1805         int error;
1806
1807         /*
1808          * Calculate the namekey and setup the key range for the scan.  This
1809          * works kinda like a chained hash table where the lower 32 bits
1810          * of the namekey synthesize the chain.
1811          *
1812          * The key range is inclusive of both key_beg and key_end.
1813          */
1814         dip = VTOI(dvp);
1815         ncp = nch->ncp;
1816
1817         if (dip->flags & HAMMER_INODE_RO)
1818                 return (EROFS);
1819
1820         hammer_start_transaction(&trans, dip->hmp);
1821
1822         namekey = hammer_directory_namekey(ncp->nc_name, ncp->nc_nlen);
1823 retry:
1824         hammer_init_cursor_hmp(&cursor, &dip->cache[0], dip->hmp);
1825         cursor.key_beg.obj_id = dip->obj_id;
1826         cursor.key_beg.key = namekey;
1827         cursor.key_beg.create_tid = 0;
1828         cursor.key_beg.delete_tid = 0;
1829         cursor.key_beg.rec_type = HAMMER_RECTYPE_DIRENTRY;
1830         cursor.key_beg.obj_type = 0;
1831
1832         cursor.key_end = cursor.key_beg;
1833         cursor.key_end.key |= 0xFFFFFFFFULL;
1834         cursor.asof = dip->obj_asof;
1835         cursor.flags |= HAMMER_CURSOR_END_INCLUSIVE | HAMMER_CURSOR_ASOF;
1836
1837         /*
1838          * Scan all matching records (the chain), locate the one matching
1839          * the requested path component.  info->last_error contains the
1840          * error code on search termination and could be 0, ENOENT, or
1841          * something else.
1842          *
1843          * The hammer_ip_*() functions merge in-memory records with on-disk
1844          * records for the purposes of the search.
1845          */
1846         error = hammer_ip_first(&cursor, dip);
1847         while (error == 0) {
1848                 error = hammer_ip_resolve_data(&cursor);
1849                 if (error)
1850                         break;
1851                 rec = cursor.record;
1852                 if (ncp->nc_nlen == rec->entry.base.data_len &&
1853                     bcmp(ncp->nc_name, cursor.data, ncp->nc_nlen) == 0) {
1854                         break;
1855                 }
1856                 error = hammer_ip_next(&cursor);
1857         }
1858
1859         /*
1860          * If all is ok we have to get the inode so we can adjust nlinks.
1861          *
1862          * If the target is a directory, it must be empty.
1863          */
1864         if (error == 0) {
1865                 ip = hammer_get_inode(dip->hmp, &dip->cache[1],
1866                                       rec->entry.obj_id,
1867                                       dip->hmp->asof, 0, &error);
1868                 if (error == ENOENT) {
1869                         kprintf("obj_id %016llx\n", rec->entry.obj_id);
1870                         Debugger("ENOENT unlinking object that should exist, cont to sync");
1871                         hammer_sync_hmp(dip->hmp, MNT_NOWAIT);
1872                         Debugger("ENOENT - sync done");
1873                 }
1874                 if (error == 0 && ip->ino_rec.base.base.obj_type ==
1875                                   HAMMER_OBJTYPE_DIRECTORY) {
1876                         error = hammer_ip_check_directory_empty(&trans, ip);
1877                 }
1878                 /*
1879                  * WARNING: hammer_ip_del_directory() may have to terminate
1880                  * the cursor to avoid a lock recursion.  It's ok to call
1881                  * hammer_done_cursor() twice.
1882                  */
1883                 if (error == 0)
1884                         error = hammer_ip_del_directory(&trans, &cursor, dip, ip);
1885                 if (error == 0) {
1886                         cache_setunresolved(nch);
1887                         cache_setvp(nch, NULL);
1888                         /* XXX locking */
1889                         if (ip->vp)
1890                                 cache_inval_vp(ip->vp, CINV_DESTROY);
1891                 }
1892                 hammer_rel_inode(ip, 0);
1893         }
1894         hammer_done_cursor(&cursor);
1895         if (error == EDEADLK)
1896                 goto retry;
1897
1898         if (error == 0)
1899                 hammer_commit_transaction(&trans);
1900         else
1901                 hammer_abort_transaction(&trans);
1902         return (error);
1903 }
1904
1905 /************************************************************************
1906  *                          FIFO AND SPECFS OPS                         *
1907  ************************************************************************
1908  *
1909  */
1910
1911 static int
1912 hammer_vop_fifoclose (struct vop_close_args *ap)
1913 {
1914         /* XXX update itimes */
1915         return (VOCALL(&fifo_vnode_vops, &ap->a_head));
1916 }
1917
1918 static int
1919 hammer_vop_fiforead (struct vop_read_args *ap)
1920 {
1921         int error;
1922
1923         error = VOCALL(&fifo_vnode_vops, &ap->a_head);
1924         /* XXX update access time */
1925         return (error);
1926 }
1927
1928 static int
1929 hammer_vop_fifowrite (struct vop_write_args *ap)
1930 {
1931         int error;
1932
1933         error = VOCALL(&fifo_vnode_vops, &ap->a_head);
1934         /* XXX update access time */
1935         return (error);
1936 }
1937
1938 static int
1939 hammer_vop_specclose (struct vop_close_args *ap)
1940 {
1941         /* XXX update itimes */
1942         return (VOCALL(&spec_vnode_vops, &ap->a_head));
1943 }
1944
1945 static int
1946 hammer_vop_specread (struct vop_read_args *ap)
1947 {
1948         /* XXX update access time */
1949         return (VOCALL(&spec_vnode_vops, &ap->a_head));
1950 }
1951
1952 static int
1953 hammer_vop_specwrite (struct vop_write_args *ap)
1954 {
1955         /* XXX update last change time */
1956         return (VOCALL(&spec_vnode_vops, &ap->a_head));
1957 }
1958